I have an '02 tacoma. The 4WD doesn't work and the check engine light is on. I took it to Toyota dealer and they said that I have a bad O2 sensor. He said the one in the back. The part number from Toyota is 89467-35001. I am somewhat handy and I think I can replace this myself or have a friend do it. They also said that the Front Differential Add Switch is not working. This is why the 4WD isn't working. Does this sound correct? He said the part number for that is 41400-34013. Again I am hoping I can buy the part and fix it myself. The dealer wants $1395 to replace these items. I found this on ebay but I am not sure if they are the right parts.
http://www.ebay.com/itm/BORG-WARNER-...item27c3bd114b O2 sensor
http://www.ebay.com/itm/Toyota-T100-...item1e6362c30b Front Diff Add switch
I would like to know how I can verify these are the correct parts. I don't want to order the wrong thing.
Thanks for the help...